6D.5

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Ellis Song 4I
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

6D.5

Postby Ellis Song 4I » Wed Jan 22, 2020 4:55 pm

Calculate the pH, pOH, and percentage protonation of solute in each of the following aqueous solutions: a) 0.057 M NH3; b) 0.162 M NH2OH; c) 0.35 M (CH3)3N; d) 0.0073 M codeine, given that pKa of its conjugate acid is 8.21.

I'm confused on how exactly to do this problem. Are we supposed to have K values memorized?

Ruby Tang 2J
Posts: 102
Joined: Fri Aug 30, 2019 12:15 am

Re: 6D.5

Postby Ruby Tang 2J » Wed Jan 22, 2020 4:57 pm

I believe for (a)-(c), there is a table in the relevant section of the textbook that has the Kb values of common weak bases. If you look at the solutions manual, there are no calculations made for Kb, which seems to indicate that they assumed Kb was meant to be given for the problem.

Rohit Ghosh 4F
Posts: 99
Joined: Thu Jul 25, 2019 12:17 am

Re: 6D.5

Postby Rohit Ghosh 4F » Thu Jan 23, 2020 12:34 pm

Yes the instructions for this section of problems tell you to look at their tables for equilibrium values.


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